esp_components/zh_ac_dimmer
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feat!: changed support for AC frequency to 400 Hz only

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This commit is contained in:
Alexey Zholtikov
2025-12-10 09:47:51 +03:00
parent c0ca733872
commit b4224641db
3 changed files with 10 additions and 26 deletions
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10
README.md
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@@ -1,17 +1,13 @@
# ESP32 ESP-IDF component for AC dimmer
# ESP32 ESP-IDF component for AC dimmer 115V/400Hz
## Tested on
1. [ESP32 ESP-IDF v5.5.1](https://docs.espressif.com/projects/esp-idf/en/v5.5.1/esp32/index.html)
## Features
1. Supports frequency up to 400 Hz.
2. Automatic frequency detection.
## Attention
For correct operation, please enable the following settings in the menuconfig:
1. Supports frequency 400Hz only.
2. For correct operation, please enable the following settings in the menuconfig:
```text
GPIO_CTRL_FUNC_IN_IRAM

2
version.txt
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@@ -1 +1 @@
1.2.0
2.0.0

24
zh_ac_dimmer.c
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@@ -18,9 +18,6 @@ static gptimer_alarm_config_t _alarm_config = {0};
static zh_ac_dimmer_init_config_t _init_config = {0};
static volatile uint64_t _prev_us = 0;
static volatile uint32_t _current_period_us = 0;
static volatile uint32_t _prev_period_us = 0;
static volatile uint16_t _zero_cross_us = 0;
static volatile uint8_t _dimmer_value = 0;
static volatile bool _is_dimmer_work = false;
static bool _is_initialized = false;
@@ -73,9 +70,6 @@ esp_err_t zh_ac_dimmer_deinit(void)
_is_initialized = false;
_dimmer_timer = NULL;
_dimmer_value = 0;
_current_period_us = 0;
_prev_period_us = 0;
_zero_cross_us = 0;
_prev_us = 0;
ZH_LOGI("AC dimmer deinitialization completed successfully.");
return ESP_OK;
@@ -144,7 +138,7 @@ static esp_err_t _zh_ac_dimmer_gpio_init(const zh_ac_dimmer_init_config_t *confi
.intr_type = GPIO_INTR_POSEDGE,
.mode = GPIO_MODE_INPUT,
.pin_bit_mask = (1ULL << config->zero_cross_gpio),
.pull_down_en = GPIO_PULLDOWN_DISABLE,
.pull_down_en = GPIO_PULLDOWN_ENABLE,
.pull_up_en = GPIO_PULLUP_DISABLE,
};
err = gpio_config(&zero_cross_gpio_config);
@@ -188,23 +182,17 @@ static esp_err_t _zh_ac_dimmer_timer_init(void)
static void IRAM_ATTR _zh_ac_dimmer_isr_handler(void *arg)
{
if (_is_dimmer_work == false)
uint64_t _current_us = esp_timer_get_time();
if (_current_us - _prev_us <= (1250 * 0.9)) // 90% of zero crossing period (1250 µs) at 400 Hz.
{
return;
}
gpio_set_level(_init_config.triac_gpio, 0);
uint64_t _current_us = esp_timer_get_time();
_current_period_us = (uint32_t)(_current_us - _prev_us);
_prev_us = _current_us;
if (_current_period_us < 1000)
if (_is_dimmer_work == false)
{
if (_current_period_us > 50)
{
_zero_cross_us = (uint16_t)_current_period_us;
return;
}
_current_period_us = _prev_period_us;
}
_prev_period_us = _current_period_us;
if (_dimmer_value != 0)
{
if (_dimmer_value == 100)
@@ -212,7 +200,7 @@ static void IRAM_ATTR _zh_ac_dimmer_isr_handler(void *arg)
gpio_set_level(_init_config.triac_gpio, 1);
return;
}
_alarm_config.alarm_count = (uint64_t)(((_current_period_us / 110) * (100 - _dimmer_value)) + _zero_cross_us);
_alarm_config.alarm_count = (uint64_t)((((1250 - 330) / 100) * (100 - _dimmer_value)) + 330); // 330 is 50% of zero crossing time (by logic analyser).
_alarm_config.flags.auto_reload_on_alarm = false;
gptimer_set_alarm_action(_dimmer_timer, &_alarm_config);
gptimer_start(_dimmer_timer);